Butter stick slicer



FIG. 1 is a perspective view of a butter stick slicer showing my new design, the scale and legend signs are shown in broken lines for illustrative purposes only and form no part of the claimed design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a side view thereof, the opposite side being a mirror image;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is an end view thereof, the opposite end being a mirror image. 

The ornamental design for a butter stick slicer, as shown and described. 